this is most likly a Metallurgy question I am using 17-4 stainless steel to make a mechinical fishing gaff it has moving parts and used in saltwater. I am tig welding a 1/4 round bar to a 1/8 x 3/4 flat bar the flat bar is 3 inchs long, the flat bar and about 2 inches up the round bar is rusting very fast like 1 use in saltwater what can I do to stop this. I know it must have something to do with welding it I am using wire for 17-4 ph stainless so I know it is not the wire